CN218449577U - High-voltage pulse charging system - Google Patents
High-voltage pulse charging system Download PDFInfo
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- CN218449577U CN218449577U CN202221200907.9U CN202221200907U CN218449577U CN 218449577 U CN218449577 U CN 218449577U CN 202221200907 U CN202221200907 U CN 202221200907U CN 218449577 U CN218449577 U CN 218449577U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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Abstract
The utility model discloses a high-voltage pulse charging system relates to rectifier and filter circuit, and the system mainly comprises an insulated gate bipolar transistor full-bridge inverter, a pulse step-up transformer, a feedback circuit and a control drive circuit, wherein the rectifier and filter circuit is connected with the insulated gate bipolar transistor full-bridge inverter to obtain a bipolar first pulse, and the pulse step-up transformer converts the bipolar first pulse into a second pulse; the control driving circuit and the feedback circuit assist together to output a working instruction of the insulated gate bipolar transistor full-bridge inverter, wherein the working instruction is determined when the voltage value of the bipolar first pulse acquired by the feedback circuit is smaller than a set threshold value, so that the high voltage set by the high-voltage pulse is achieved, the purpose of charging with low current is achieved, and the problem of serious heating of a battery pack caused by overlarge current can be avoided.
Description
Technical Field
The utility model relates to a pulse field of charging especially relates to a high-voltage pulse charging system.
Background
At present, a new energy source EVEV (Electric Vehicles) is brought up in the world, with the continuous updating and the changing of the technology, the anxiety of people on endurance is relieved to a great extent by the continuous bright phase of a high-endurance vehicle type, but the charging is slow and is the weakness of the EV. To address this problem, high voltage platform technology and associated super-charging systems are among the best-seen solutions at present.
At present, the Porsche Taycan with 800V high platform voltage is produced in the industry at first, the maximum charging power is increased to 350Kw, the charging speed is 3 times of that of a Tesla third-generation high-power direct-current charging pile, and the method becomes a super charging pile with the highest charging power in the industry at present. The rated voltage and the rated current of the charging pile are respectively 850V/200A, although the charging power is improved, the large current which is still as high as 200A is output to a battery pack, and the high-voltage wiring harness is tested according to the old inequality. For example, excessive current during charging causes a problem of heat generation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-voltage pulse charging system to reach the undercurrent and charge and can avoid because of the too big serious problem that generates heat of battery package that leads to of electric current.
In order to achieve the above object, the utility model provides a following scheme:
a high voltage pulse charging system comprising: a primary topology and a secondary topology;
the one-stage topology includes at least:
the rectification filter circuit is used for converting input alternating-current voltage into direct-current voltage;
the two-stage topology includes:
the pulse forming circuit is connected with the rectifying and filtering circuit and is used for converting the direct-current voltage into a bipolar first pulse;
the pulse boosting transformer is connected with the pulse forming circuit and is used for converting the bipolar first pulse into a second pulse; the voltage value of the bipolar first pulse is lower than that of the second pulse;
the feedback circuit is connected with a primary circuit of the pulse boosting transformer and is used for acquiring the bipolar first pulse;
the control driving circuit is connected with the feedback circuit and the pulse forming circuit and used for outputting a working instruction of the pulse forming circuit; the working instruction is determined when the voltage value of the bipolar first pulse acquired by the feedback circuit is smaller than a set threshold value.
Optionally, the rectifying and filtering circuit includes: a thyristor and a rectifier circuit;
the thyristor is used for adjusting the direct-current voltage of the rectifying circuit according to the trigger angle of the thyristor.
Optionally, the thyristor firing angle is: β =180- Δ θ N;
wherein, delta theta is the angle adjusted by the thyristor trigger angle every sampling, and beta is the thyristor trigger angle after N times of sampling.
Optionally, the high-voltage pulse charging system further includes a PI control circuit;
and the PI control circuit is connected with the thyristor and is used for adjusting the trigger angle of the thyristor.
Optionally, the pulse forming circuit comprises at least:
and the insulated gate bipolar transistor full-bridge inverter is used for switching and controlling the direct current output by the previous stage to output high-voltage pulse.
Optionally, the number of the insulated gate bipolar transistor full-bridge inverters is one or more;
when the number of the insulated gate bipolar transistor full-bridge inverters is multiple, the insulated gate bipolar transistor full-bridge inverters are connected in parallel.
Optionally, the rectifier circuit is a three-phase rectifier circuit.
Optionally, the PI control circuit is provided with a soft start control program; the soft start control program is used for converting input alternating current voltage into direct current voltage.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model provides a high-voltage pulse charging system, including one-level formula topological structure and second grade formula topological structure, through rectification filter circuit, convert the alternating voltage of input into DC voltage, through the insulated gate bipolar transistor full bridge dc-to-ac converter, convert DC voltage into bipolar first pulse, through pulse step up transformer, convert the bipolar first pulse of low-voltage into the second pulse of high voltage. In the process, the bipolar first pulse input by the pulse boosting transformer is controlled by controlling the driving circuit, so that a second pulse meeting the set requirement is obtained, the purpose of charging with low current is achieved, and the problem that the battery pack generates heat seriously due to overlarge current is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a two-stage topology structure diagram of the high-voltage pulse charging system of the present invention;
FIG. 2 is a structural diagram of a high voltage pulse charging system frame;
FIG. 3 is a system block diagram of closed loop PI control;
FIG. 4 is a flow chart of a thyristor firing angle control algorithm;
fig. 5 is a schematic diagram of two insulated gate bipolar transistor full-bridge inverters directly connected in parallel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a high-voltage pulse charging system to reach the undercurrent and charge and can avoid because of the too big serious problem that generates heat of battery package that leads to of electric current.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the embodiment of the utility model provides a high-voltage pulse charging system, including two-stage topological structure, wherein, one-stage topological structure mainly uses the rectification filter circuit, the rectification filter circuit is used for converting the alternating voltage of input into direct voltage. The two-stage topology includes: the device comprises an insulated gate bipolar transistor full-bridge inverter, a pulse boosting transformer, a feedback circuit and a control drive circuit.
As shown in fig. 2, in the embodiment of the present invention, the first-level topology is mainly used to obtain the high voltage dc power, and the second-level topology is switched on and off to output the high voltage pulse through the dc power voltage generated by the first-level topology.
Specifically, a pulse forming circuit is connected to the rectifying and filtering circuit, and the pulse forming circuit is configured to convert the dc voltage into a bipolar first pulse. The pulse boost transformer is connected with the pulse forming circuit and is used for converting the bipolar first pulse into a second pulse. The feedback circuit is connected with a primary circuit of the pulse boosting transformer and is used for acquiring a bipolar first pulse. The control driving circuit is connected with the feedback circuit and the pulse forming circuit and is used for outputting a working instruction of the pulse forming circuit; the working instruction is determined when the voltage value of the bipolar first pulse acquired by the feedback circuit is smaller than a set threshold value; wherein a voltage value of the bipolar first pulse is lower than a voltage value of the second pulse.
Further, the rectification filter circuit includes: the thyristor is used for adjusting the direct-current voltage of the rectifying circuit according to the trigger angle of the thyristor. Preferably, the rectifier circuit is a three-phase rectifier circuit.
Specifically, the utility model discloses a thyristor half accuse rectifier circuit adopts the thyristor as power switch components and parts as shown in FIG. 4, adjusts the output voltage size of direct current side through control thyristor flip angle, controls direct current output voltage's size, restraines impulse current.
Further, the thyristor firing angle is controlled as follows:
in a high-voltage pulse charging system, a thyristor firing angle is sampled once per cycle, the sampling cycle is set according to actual conditions, the angle of the thyristor firing angle adjusted once per sampling is delta theta (the angle value is self-defined), and the thyristor firing angle is as follows: β =180- Δ θ N, where Δ θ is the angle at which the thyristor firing angle is adjusted every sample, and β is the thyristor firing angle after N samples.
In fig. 4, in the process of monitoring whether the output voltage is output, a PI control circuit is required, the PI control circuit is connected to the thyristor, and the PI control circuit is used to adjust the firing angle of the thyristor. The specific cycle process of the PI control circuit is shown in detail in figure 3.
Specifically, the control algorithm formula of the digitized PI is as follows:
u(k)＝u(k-1)+K P (E(K)-E(K-1)+K 1 T*E(K))；
wherein, K P And K I The proportional coefficient and the integral coefficient are respectively adopted, T is a sampling period, u (K) and u (K-1) are output results of the PI controller after K sampling periods and K-1 sampling periods, and E (K) and E (K-1) are input of the PI controller at the K sampling time and the K-1 sampling time respectively. And then the trigger angle of the thyristor is adjusted according to the control algorithm flow chart shown in figure 4 by combining the formula above until the output voltage meets the standard.
Therefore the embodiment of the utility model provides a PI control circuit be provided with soft start control procedure, soft start control procedure is used for converting the alternating voltage of input into DC voltage.
Specifically, a PI control method is adopted as a soft start control strategy, the trigger angle of the thyristor is controlled, the direct-current output voltage is controlled by adjusting the step angle of the trigger angle of the thyristor, and the system start time can be adjusted according to actual conditions, so that the output voltage is smoothly increased to a desired value.
Specifically, the pulse forming circuit includes at least: and the insulated gate bipolar transistor full-bridge inverter is used for switching and controlling the direct current output by the previous stage to output high-voltage pulse. And the insulated gate bipolar transistor full-bridge inverter is used for switching and controlling the direct current output by the previous stage to output high-voltage pulse.
As a preferred implementation manner, the number of the full-bridge inverters of the igbt according to the embodiments of the present invention is one or more.
When the number of the insulated gate bipolar transistor full-bridge inverters is multiple, the insulated gate bipolar transistor full-bridge inverters are connected in parallel.
Specifically, the utility model discloses an insulated gate bipolar transistor full-bridge inverter adopts the parallelly connected method of insulated gate bipolar transistor switch module, guarantees that inverter circuit power level improves, but the safe application is to the high-pressure system in. A plurality of insulated gate bipolar transistor switch elements are used in parallel, an inverter circuit formed by the insulated gate bipolar transistor switch elements is basically similar to a bridge arm formed by a single-tube insulated gate bipolar transistor, a diagonal connection method is adopted when insulated gate bipolar transistor modules are connected in parallel, and a parallel principle diagram is shown in figure 5. When high pulse voltage is needed and the voltage exceeds the maximum voltage value which can be borne by the switch, the insulated gate bipolar transistor parallel module is balanced instantly when the switch is opened, dynamic current sharing is realized, pulses with lower voltage are generated, and then high-voltage pulses are obtained through the pulse boosting transformer.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. A high-voltage pulse charging system, comprising: a primary topology and a secondary topology;
the one-stage topology includes at least:
the rectification filter circuit is used for converting input alternating-current voltage into direct-current voltage;
the two-stage topology includes:
the pulse forming circuit is connected with the rectifying and filtering circuit and is used for converting the direct-current voltage into a bipolar first pulse;
the pulse boosting transformer is connected with the pulse forming circuit and is used for converting the bipolar first pulse into a second pulse; the voltage value of the bipolar first pulse is lower than that of the second pulse;
the feedback circuit is connected with the primary circuit of the pulse boosting transformer and is used for acquiring a bipolar first pulse;
the control driving circuit is connected with the feedback circuit and the pulse forming circuit and is used for outputting a working instruction of the pulse forming circuit; the working instruction is determined when the voltage value of the bipolar first pulse acquired by the feedback circuit is smaller than a set threshold value.
2. The high-voltage pulse charging system according to claim 1, wherein said rectifying filter circuit comprises: a thyristor and a rectifier circuit;
the thyristor is used for adjusting the direct-current voltage of the rectifying circuit according to the trigger angle of the thyristor.
3. The high voltage pulse charging system of claim 2, wherein the thyristor firing angle is: β =180- Δ θ N;
wherein, delta theta is the angle adjusted by sampling the trigger angle of the thyristor once, and beta is the trigger angle of the thyristor after N times of sampling.
4. The high-voltage pulse charging system according to claim 2, further comprising a PI control circuit;
and the PI control circuit is connected with the thyristor and is used for adjusting the trigger angle of the thyristor.
5. The high-voltage pulse charging system according to claim 1, wherein said pulse forming circuit comprises at least:
and the insulated gate bipolar transistor full-bridge inverter is used for switching and controlling the direct current output by the previous stage to output high-voltage pulse.
6. The high-voltage pulse charging system according to claim 5, wherein the number of the IGBT full-bridge inverters is one or more;
when the number of the insulated gate bipolar transistor full-bridge inverters is multiple, the insulated gate bipolar transistor full-bridge inverters are connected in a parallel connection mode.
7. The high-voltage pulse charging system according to claim 2, wherein said rectifier circuit is a three-phase rectifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221200907.9U CN218449577U (en) | 2022-05-18 | 2022-05-18 | High-voltage pulse charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221200907.9U CN218449577U (en) | 2022-05-18 | 2022-05-18 | High-voltage pulse charging system |
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| Publication Number | Publication Date |
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| CN218449577U true CN218449577U (en) | 2023-02-03 |
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| CN202221200907.9U Active CN218449577U (en) | 2022-05-18 | 2022-05-18 | High-voltage pulse charging system |
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